What relationship describes how the amplitude of a membrane potential change varies with the distance from a current injection site?

Question

Quizplus · Accepted Answer

The correct relationship that describes how the amplitude of a membrane potential change varies with the distance from a current injection site is given by the cable equation, which in its simplified form can be represented as a change in voltage (ΔV) being proportional to an exponential decay function of the distance (x) from the source of the current injection, divided by the length constant (λ). This is captured in choice B, where the exponential term e^(-x/λ) describes how the voltage change decreases with increasing distance from the site of current injection.

What Relationship Describes How the Amplitude of a Membrane Potential